<template>
  <el-container class="main-container">
    <!-- 头部区域 -->
    <el-header>
      <!-- 左侧的 logo -->
      <img src="../../assets/images/logo.png"
           alt="" />
      <!-- 右侧的菜单 -->
      <el-menu class="el-menu-top"
               mode="horizontal"
               background-color="#23262E"
               text-color="#fff"
               active-text-color="#409EFF">
        <el-submenu index="1">
          <template slot="title">
            <!-- 头像 -->
            <img :src="userInfo.user_pic"
                 alt=""
                 class="avatar"
                 v-if="userInfo.user_pic" />
            <img src="../../assets/logo.png"
                 alt=""
                 class="avatar"
                 v-else />
            <span>个人中心</span>
          </template>
          <el-menu-item index="1-1"><i class="el-icon-s-operation"></i>基本资料</el-menu-item>
          <el-menu-item index="1-2"><i class="el-icon-camera"></i>更换头像</el-menu-item>
          <el-menu-item index="1-3"><i class="el-icon-key"></i>重置密码</el-menu-item>
        </el-submenu>
        <el-menu-item index="2"
                      @click="goOut"><i class="el-icon-switch-button"></i>退出</el-menu-item>
      </el-menu>
    </el-header>
    <el-container>
      <!-- 侧边栏区域 -->
      <!-- 左侧边栏区域 -->
      <el-aside width="200px">
        <div class="user-box">
          <img :src="userInfo.user_pic"
               alt=""
               v-if="userInfo.user_pic" />
          <img src="../../assets/logo.png"
               alt=""
               v-else />
          <span>欢迎 {{userInfo.nickname || userInfo.username}}</span>
        </div>
        <el-menu default-active="$route.path"
                 class="el-menu-vertical-demo"
                 background-color="#23262E"
                 text-color="#fff"
                 active-text-color="#409EFF"
                 unique-opened
                 router>
          <template v-for="item in menus">
            <!-- 不包含子菜单的“一级菜单” -->
            <el-menu-item :index="item.indexPath"
                          :key="item.indexPath"
                          v-if="!item.children"><i :class="item.icon"></i>{{item.title}}</el-menu-item>
            <!-- 包含子菜单的“一级菜单” -->
            <el-submenu :index="item.indexPath"
                        :key="item.indexPath"
                        v-else>
              <template #title>
                <i :class="item.icon"></i>
                <span>{{item.title}}</span>
              </template>
              <el-menu-item v-for="subItem in item.children"
                            :key="subItem.indexPath"
                            :index="subItem.indexPath"><i :class="subItem.icon"></i>{{subItem.title}}</el-menu-item>
            </el-submenu>
          </template>
</el-menu>
</el-aside>
      <el-container>
        <!-- 页面主体区域 -->
        <el-main>
        <router-view></router-view>
        </el-main>
        <!-- 底部 footer 区域 -->
        <el-footer>© www.itheima.com - 黑马程序员</el-footer>
      </el-container>
    </el-container>
  </el-container>
</template>

<script>
import { mapState } from 'vuex'
export default {
  data () {
    return {
      menus: []
    }
  },
  name: 'Main',
  created () {
    if (this.token) {
      this.$store.dispatch('initUserInfo')
      this.initMenus()
    } else {
      this.$router.push('/login')
    }
  },
  computed: {
    ...mapState(['userInfo', 'token'])
  },
  methods: {
    async goOut () {
      const result = await this.$confirm('此操作将退出登录, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (result !== 'confirm') return
      this.$store.commit('updateToken', '')
      this.$store.commit('updateUserInfo', '')
      this.$router.push('/login')
    },
    async initMenus () {
      const { data: res } = await this.$http.get('/my/menus')
      if (res.code !== 0) return this.$message.error('获取失败')
      this.menus = res.data
    }
  }
}
</script>

<style lang="less" scoped>
.main-container {
  height: 100%;
  .el-header,
  .el-aside {
    background-color: #23262e;
  }
  .el-header {
    padding: 0;
    display: flex;
    justify-content: space-between;
  }
  .el-main {
    overflow-y: scroll;
    height: 0;
    background-color: #f2f2f2;
  }
  .el-footer {
    background-color: #eee;
    font-size: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
  }
}

.avatar {
  border-radius: 50%;
  width: 35px;
  height: 35px;
  background-color: #fff;
  margin-right: 10px;
  object-fit: cover;
}
// 左侧边栏用户信息区域
.user-box {
  height: 70px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-top: 1px solid #000;
  border-bottom: 1px solid #000;
  user-select: none;
  img {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background-color: #fff;
    margin-right: 15px;
    object-fit: cover;
  }
  span {
    color: white;
    font-size: 12px;
  }
  // 侧边栏菜单的样式
  .el-aside {
    .el-submenu,
    .el-menu-item {
      width: 200px;
      user-select: none;
    }
  }
}
</style>
